Originally posted 20 Apr 21
Justin Welby said he had not been aware confidentiality agreements were being used to stop people speaking publicly.
He told Times Radio the documentary was "rightly shaming".
Mr Welby added that he was "horrified" to hear the extent of racist abuse within the Church.
"I have said many times that I am totally against NDAs [non-disclosure agreements]. NDAs are unacceptable. I am just horrified by that and horrified by the fact of racism," he said.
Together with the Archbishop of York, Stephen Cottrell, he has written to senior members of the Church, telling them confidentiality agreements are no longer to be used.
The Church of England is releasing a report later this week, which it says will include plans to address racism within its own ranks.
Dr Elizabeth Henry, the Church's former adviser on race relations, quit her job last year because she said she felt disillusioned.
"I felt frustrated by the lack of progress with issues of racism," she told Panorama.